Make use of molecular sieve adsorption capacity for natural gas drying and purification devices, is widely used in natural gas extraction, transportation, filling and other links.The complete set of equipment consists of two parallel work of the drying tower and heater, circulating fan, cooler, filter composition. In addition to drying tower, regeneration tower switching requires manual operation, the rest of all actions by the device automatically, can also be designed to all automatic.
Wellhead outflow of the natural gas almost all saturated gas phase water, and even carry a certain amount of liquid water. The presence of moisture in natural gas often causes serious consequences: natural gas containing CO2 and H2S forms acid in the presence of water and corrodes the pipeline and equipment; forms gas hydrates under certain conditions to block valves, pipes and equipment; Reduce the pipeline transport capacity, resulting in unnecessary power consumption. The presence of moisture in the presence of natural gas is very unfavorable, so the need for dehydration is more stringent.
In natural gas processing, dehydration, desulfurization process can be used adsorption method. Especially the adsorption dehydration, because of its deep dewatering high, simple device, small footprint and so on.
The performance of the adsorbent is extremely important for the adsorption operation. Industrial adsorbents should meet the following requirements: High selectivity, large internal surface area, high adsorption activity, certain mechanical strength and physical properties, good chemical inertness, thermal stability As well as cheap and so easy.
Natural gas gas commonly used in the adsorbent: silica gel, activated alumina, activated bauxite and molecular sieve.
> Ethanol Drying
Ethanol at room temperature and pressure is a flammable, volatile colorless transparent liquid, low toxicity, pure liquid can not be directly consumed; with a special flavor, and slightly stimulated; slightly sweet, and accompanied by stimulating spicy taste. Flammable, the vapor can form an explosive mixture with the air, with water to be more than miscible.
The importance of molecular sieves in ethanol purification: Molecular sieve is a colorless, odorless, non-toxic new material, in the anhydrous ethanol preparation and other azeotropic mixture separation process without adding the third component, the production process almost no toxic waste emissions; , Cyclohexane and other highly toxic third components. Process is simple and reliable, excellent product quality, is an environmentally friendly, energy-saving technology.
The advantage is that it can reduce the installation height of the equipment, improve the effective adsorption capacity of the fixed bed and the quality stability of the finished product. The resulting waste gas, waste residue, waste liquid have a very good treatment.
Ethanol is widely used and can be used for: Solvent; organic synthesis; crystallization of various compounds; detergent; extractant; Consumption of alcohol can be blending liquor; used as a binder; nitro paint; varnish, cosmetics, ink, paint remover and other solvents and pesticides, pharmaceuticals, rubber, plastics, man-made fibers, detergents and other manufacturing materials, Antifreeze, fuel, disinfectant and so on. 75% of the ethanol solution is commonly used for medical disinfection.
> Air Separation
The most common methods for air separation are Air deep freezing, adsorption, membrane separation which is based on different physical properties of components in the air. It can isolate the oxygen and nitrogen from the air, or at the same time, extract rare gases such as helium and argon.
Air separation can produce oxygen, nitrogen and rare gases, and the gas products can be obtained with a purity of 98.0% ~ 99.9%. In addition, molecular sieve adsorption method is popular used to separate the air, which is used to make oxygen-rich air containing 80% ~ 95% of oxygen.
CHEMXIN13X-APG Molecular Sieve is an air separation special molecular sieve with higher adsorption capacity of carbon dioxide and water. It can avoid frozen tower phenomenon appeared in the process of air separation to meet the special requirements of air separation industry
Activated Alumina KA405 has many micro-paths and the specific surface is large. It can be used as absorbent, desiccant and widely used in the deep drying of cracked gas, ethylene and propylene, hydrogen-generation, air separation, instrument air drying.
> Paint, Resin, Adhesives
Chemxin Activated Molecular Sieve Powder is dehydrated synthetic powder molecular sieve. With the character of high dispersibility and rapid adsorbability. It is used in some special absorptive circumstances, such as being formless desiccant, being adsorbent mixed with other materials etc. It can remove water eliminate bubbles, increase uniformity and strength when being additive or base in paint, resin and some adhesives. It can also be used as desiccant in insulating glass rubber spacer.
> Oxygen Concentration
Specific Molecular Sieve for Oxygen Generator Special Oxygen Molecular Sieve was developed newly XH-type home or medical oxygen dedicated molecular sieve, with higher purity oxygen, faster and longer life. Such characteristics of molecular sieve is an important breakthrough in health care industry.
Oxygen production principle: The compressor through pressure swing adsorption from air, pulling air into molecular sieve, molecualr sieve will adsorb nitrogen, carbon dioxide and other waste gas from air, only leaving oxygen into the gas cylinder. Then through high pressure valve for high pressure purification.In the last making purity of oxygen production up to standard and output oxygen.
> PSA Nitrogen Generator
Carbon molecular sieve microporous has strong affinity for oxygen molecules, it’s usually used to separate the oxygen and nitrogen in the air, and for making nitrogen with pressure swing adsorption device (PSA) in industry.
CHEMXIN carbon molecular sieve is with large amount of nitrogen, high nitrogen recovery rate, long service life, it’s suitable for various types of pressure swing adsorption nitrogen machines, and it’s the preferred product of PSA system.
Introduction (molecular sieve nitrogen) The smaller diameter gas (oxygen) diffuses faster, most of them has been adsorbed into the molecular sieve solid phase, so that to get more nitrogen. After a period of time, the adsorption of oxygen on the molecular sieve is balanced, according to the different adsorption capacity of the carbon molecular sieve at different pressures, reduce the pressure of the machine to remove the adsorption of oxygen, this process is called regeneration. Pressure swing adsorption method is usually used in parallel with the two columns, alternating pressure adsorption and decompression regeneration, in order to obtain a continuous nitrogen flow.
Molecular sieve nitrogen (advantage) PSA nitrogen method is the rapid development of the seventies a new nitrogen technology. Compared with the traditional nitrogen method, it has a simple process, high degree of automation, fast gas production (15 to 30 minutes), low energy consumption, product purity can be adjusted in a large range according to user needs, easy operation and maintenance Low cost, strong adaptability and other characteristics of the device, so it’s competitive in the 1000Nm3 / h nitrogen equipment, more and more access to medium and small nitrogen users, PSA nitrogen has become the choice of medium and small nitrogen users.
Carbon molecular sieve and zeolite molecular sieve are widely used in the field of nitrogen, oxygen production . The molecular sieve separation of oxygen and nitrogen is mainly based on the difference diffusion rate of these two gases on the surface of the molecular sieve, carbon molecular sieve is a carbon-based adsorbent which combine activated carbon and some character of molecular sieve.